Transmited

This disease is passed down from many family members

It is an X-Linked (the gene on the X Chromosome)

If a woman has an premutation she has a 50% chance of passing it on in each pregnancy. If she has a premutation and it passes it on it it can still be a premutation or it can turn into a full mutation.

Males with premutation will pass it on to all daughters and it will not pass on to any sons